1.The diagnosis of form deprivation amblyopia must be based on the possible factors that lead to amblyopia and exclude all other pathological factors that lead to vision loss. Infants within 6 months of birth, if there is obvious opacity of refractive media, such as corneal scar, cataract, vitreous opacity or other factors that affect the entry of light into the eyes, such as ptosis, all suggest the possibility of tangible deprivation amblyopia.

2.Children with amblyopia have no complaints, but abnormalities are found in the visual examination, so early visual screening is very important for the discovery of amblyopia. The visual function of infants can be measured by optokinetic nystagmus and selective viewing. Children aged 2 to 4 will generally use E-chart under the guidance of parents and teachers. If they can't use it, they can choose graphic chart. Children over 5 years old can use E-chart as adults.

3.Eye position examination.

4.Check the nature of gaze.

5.Inspection of refractive state.

6.VEP examination generally uses graphic VEP. The amplitude of VEP in some amblyopic eyes decreases significantly, and the latency of each peak is significantly prolonged. VEP provides a new, objective and nondestructive examination method for the clinical diagnosis of amblyopia, which has reference significance for the early diagnosis of amblyopia in children, and has certain reference value for the differential diagnosis, treatment and prognosis of amblyopia.